Art of craftsmanship



Dec. 9, 1969 J. L. JACOBUS 3,432,334

ART OF CRAFTSMANSHIP Filed Dec. 18, 1967 2 Sheets-Sheet l JOHN L. EY JAQDBUS fr izlarnoa "*W' Dec. 9, 1969 J. L. JACOBUS 3,432,334

ART OF CRAFTSMANSHIP 'Filed Dec. 18, 1967 2 Sheets-Sheet 2 FIG'ZO BY United States Patent 3,482,334 ART OF CRAFISMANSHIP John Lindsey Jacobus, 28367 Waverly St., Roseville, Mich. 48066 Filed Dec. 18, 1967, Ser. No. 691,604 Int. Cl.'A68h 33/06 US. Cl. 35-72 Claims ABSTRACT OF THE DISCLOSURE Means and method in the art of craftsmanship are dis closed for construction by surfaces of three dimensional complexly shaped objects by edge to edge union in triangular cross-section of three planar shapes cut out from a flat sheet material, each of said shapes constructed with edges having a predetermined relationship with an edge of the other of two shapes, and holding the three shapes in predetermined edgewise relationship with each other to form one-half of a threedimensional four curved sided four non-straight edged object which half is hollow, triangular in cross-section, two curved sided and three non-straight edged, two of the sides of said half being curved and the third planar for abutting against the corresponding planar side of the other half of said object.

My invention relates to the-art of craftsmanship.

The principal object of my invention is the provision of means and method in the art of craftsmanship for construction by surfaces of three dimensional four curved sided four non-straight edged symmetricalobjects by edge to edge union in triangular cross-section of three planar shapes cut out from fiat sheet material by which many advantages are realized among which are elimination of time-consuming and tedious fabrication and finishing techniques and the need to preshape surfaces prior to fabrication. I P f t The foregoing object of my invention together with its advantages will become apparent during the course of "the following description taken in conjunction with the accompanying-drawings in which:

FIG. 1 is a symmetrical three' dimensional ornamental "model embodying my invention;

FIGS. '2'8 are planar shapes embodying my invention cut out from flat sheet material for constructing said said model via different center sections; FIGS. 20 and 22 being center sections of the models shown in FIGS. 19 and 21, respectively. j a

. Briefly my invention comprises means and method in the art of craftsmanship for construction by surfaces of three dimensional complexly shaped objects by edge to edge union in vtriangular cross-section of three planar shapes cut out from'flat sheet material. Each of said shapes is constructed with edges having a predetermined relationship with an edge of the other of two shapes. The three shapes are held in edgewise relationship with each other to form one-half of a three-dimensional four curved sided four non-straight edged object which half is hollow, triangular in cross-section, non-straight edged, and three sided corresponding to said three shapes. By non-straight edged I mean that each of the four external entire edges of the object from front center to back center is not a straight line but rather is curved or is made up of short segments which in their totality present a curved line outline. Two of the sides of said half are curved and the third is planar for abutting against the corresponding 3,482,334 Patented Dec. 9, 1969 planar side of the other half of said object which other half is constructed by surfaces in like manner.

Referring to the drawings in greater detail, M designates a symmetrical three dimensional four curved sided four curved edged ornamental model resembling a streamlined object suggestive of speed. X-1, Y-1 and Z-1 designate three planar shapes cut out from a flat sheet material. The flat sheet material must be capable of assuming a curved shape during assembly of the object without requiring preforming as by stamping or rolling. Balsa wood, cardboard, stiff plastic sheet, and thin sheets 'of metal or combinations of these are examples of suitable flat sheet materials. Each of said shapes X-l, Y-1 and. Zl is constructed with'curved edges having a predetermined relationship with an edge of the other two shapes so that the three shapes form whenheld in edgewise relationship with each other one half of said model which half is designated H-l. Said sapes X-l, Y-1 and Z1 may be held in edgewise relationship with each other in any known manner, e.g. by taping or gluing them together or by retaining them together by mechanical fasteners. The corresponding mating edges of the shapes X-l; Y-1; and Zl are respectively designated AAA, CCC; AAA, BBB; and BBB, CCC. Said half H-1 is hollow, three edged and three sided corresponding to said three shapes. Two of the sides of said half H-l are curved, to wit: Y-1 and Z-1 and the third side X-l is planar for abutting against the corresponding planar side of the other half of said object. X-2, Y-2 and Z2 designate three other planar shapes cut out from fiat sheet material which are the inverse image, respectively, of the first-mentioned three shapes X1, Y-l and Z1. The three inverse shapes X-2, Y-2 and Z2 form when held in edgewise relationship with each other the other half of said model of like construction as the half H-1 which other half is designated H-2. Said inverse shapes X-2, Y2 and Z2 may be held in edgewise relationship with each other in like manner as stated for the shapes X1, Y-l and Z.1. The corresponding mating edges of the inverse shapes X-2, Y-2 and Z2 are respectively designated DDD, FFF; DDD, BBB; and EEE, FFF. The two sides Y-2 and Z-2 of said half H-2 are curved and the third side X-2 is planar for abutting against the corresponding planar side X-l of the half H-1. The halves H-1 and H-2 are thus joined with their planar sides X-l and X-2, respectively, in abutting relationship to each other to form the model M. The model M is symmetrical about a fiat plane through the center thereof corresponding to said abutting planar sides X-1 and X-2. Each of the four edges of said model M is defined by a curved line, two of which are symmetrical about said center plane. Each of the four sides of said model M is curved. The three planar shapes X-l, Y 1 and Z-1 may be made by first making a solid model, e.g. of clay, of the same external shape as the half H-1 and then laying in turn on the surfaces of the sides of the solid model three templates of suitable material, e.g. tissue paper, and scribing on each template the outline of the respective side of such solid model. The templates thus made may then be laid on the flat sheet material from which the three planar shapes X-l, Y-l and Z1 are to be cut out and their outlines traced thereon. The three planar inverse shapes X2, Y-2 and Z2 can be made from the same three templates by simply inverting them on the same side of said flat sheet material and by tracing thereon their outlines as inverted. The planar shapes X-l, Y1, Z1 and the inverse shapes X-2, Y-2 and Z2 can be simultaneously printed or embossed on the same side of the flat sheet material. The planar shapes X-l, Y-l and 2-1 and the inverse shapes X-2, Y-Z and Z2 can be made proportionately larger by known means, e.g. a coordinate system or proportionate dividers. A seventh planar shape cut out from flat sheet material and designated C :is disposed in said center plane in the instance and held between and separating said halves H-1 and H-2. The shape C has two tabs which project beneath the sides Z-l and Z-2 and hence beneath the model M and support the latter via a pair of wheel simulating objects constructed of planar shapes of well known form and construction also cut out from flat sheet material. The model M is preferably made from flat sheet material which has a finished surface and consequently when said model M is assembled it need not be finished on its surfaces but rather only at its edges.

, ,FIG. 18" illustrates a model 2M supported by an upstanding ring constructed of a planar shape of well known construction also cut out from flat sheet material. The model 2M is of identical construction as the model M except for the center section 2C which has only one tab which is split to receive the supporting ring.

FIG. 19 illustrates a model 3M suggestive of a rocket. The model 3M is of identical construction as the model M except for the center section 30 which is split inwardly from its bottom edge to serve as a free standing support for said model 3M.

FIG. 21 illustrates a model 4M the center section 4C of-which has means for suspending said model 4M from suitable structure via a string and for suspending two other identical models 4M from the first-mentioned model 4M via strings to form a mobile display.

The means and method of my invention for constructing by surfaces of three dimensional four non-straight sided four curved edged symmetrical objects can be employed for making utilitarian objects as well as ornamental ones.

It will thus be seen that there has been provided by my invention improvements in the art of craftsmanship in which the object hereinabove set forth together with many thoroughly practical advantages has been successfully achieved. Model M represents the least complexly shaped object which can be made by practicing my invention and one which lends itself to the simplest description. It should be understood that variations and changes may be resorted to and additional three dimensional complexly shaped objects may be made without departing from the spirit of my invention as defined by the appended claims.

What is claimed is:

1. Means in the art of craftsmanship for making three dimensional four curved sided four non-straight edged symmetrical objects comprising three planar shapes cut out from flat sheet material, each of said shapes constructed with non-straight edges from front to back having a predetermined relationship with an edge of the other two shapes so that the three shapes form when held in edgewise relationship with each other one half of a three dimensional four curved sided four non-straight edged object which half is hollow, triangular in cross-section, two curved sided and three non-straight edged from front to back thereof, two of the sides of said half being curved and'the third planar for abutting against the corresponding planar side of the other half of said object.

2. Means as claimed in claim 1 and further comprising three other planar shapes out out from fiat sheet material which are the inverse images of the first-mentioned three shapes and form when held in like manner the other half 3. Means'as claimed in claim 2 and further comprising a seventh planar shape cut out from flat sheet material, said seventh shape constructed to be held between and to separate said halves.

4. Means as claimed in claim 2 and further comprising a three dimensional four curved sided four non-straight edged symmetrical object made of the aforementioned halves held with corresponding planar'sides of each in abutting relationship to each other, said object symmetrical about a flat plane through the center thereof corresponding to said abutting sides and having each of its edges from front center to back center defined by a non-straight line, two of said edges symmetrical with respect to each other about'said center plane.

5. Means as claimed inclaim 4 and further comprising a seventh planar shape cut out from flat sheet material, said seventh shape disposedin said center plane and held between and separating said halves.

6. Method in the art of craftsmanship for making four curved sided four non-straight edged symmetrical objects comprising cutting out from flat sheet material three planar shapes so that each of said shapes have nonstraight edges from front to back having a predetermined relationship with an edge of the other two said shapes, and holding the three shapes in edgewise relationship with each other to form one-half of a three dimensional four curved sided four non-straight'edged object which half is hollow, triangular in cross-section, two curved sided, and three non-straight edged from front to back thereof, two of the sides of said half being curved and the third planar for abutting against the corresponding planar side of the other half of said object.

7. Method as claimed in claim 6 and further comprising cutting out from fiat sheet material three other planar shapes which are the inverse image of the first mentioned three shapes, and holding the three other inverse shapes in like manner to form the other half of said object.

8. Method as claimed in claim 7 and further comprising forming a three dimensional fourrcurved sided four non-straight edged symmetrical object by holding the aforementioned halves with corresponding planar sides of each in abutting relationship to each other, said object symmetrical about a fiat plane through the center thereof corresponding to said abutting sides and having each of its four edges from front center to back center defined by a non-straight line, two of said edges symmetrical with respect to each other about said center plane.

9. Method as claimed in claim 8 andfurther comprising cutting out from flat sheet material a seventh planar shape, and holding the same disposed in said center plane between and separating said halves.

10. Method as claimed in claim 9 and further comprising supporting said model via said seventh planar shape.

References Cited 7 UNITED STATES PATENTS 6/1951 Babcock 46-17 1/1959 Breuil 4617 X US. Cl. X.R. 

